Until recently, the medical community believed that most hearing loss was ca

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问题 Until recently, the medical community believed that most hearing loss was caused by hear cells in the ear degrading as we age. But evidence is emerging that sound levels at sporting events, concerts, nightclubs and on personal devices can cause lasting damage to the connections between hear cells in the ear and the nerves that【C1】______sounds to the brain. Over 1.1 billion teenagers and young adults worldwide could be at risk of hearing loss as a result of【C2】______to unsafe levels of recreational noise, according to a recent World Health Organization report. To make matters worse, this kind of hearing loss doesn’t show up on【C3】______tests. Researchers are calling it a hidden epidemic. "We think this problem is【C4】______prevalent, but it’s difficult to measure because the tools we have available today are not sensitive enough," says Konstantina Stankovic, an auditory neuroscientist and surgeon at Massachusetts Eye and Ear, and Harvard Medical School, in Boston.
Stankovic is now working with colleagues at the Swiss Federal Institute of Technology in Lausanne to develop imaging【C5】______that would allow us to see this kind of neural damage in living brains. This could help with early diagnosis. Others are developing drugs that could help【C6】______the connections between the ear and the brain.
To properly【C7】______our ears, loud noises should be banned in many public places just as smoking is now, says Stankovic. Some countries have laws in place to protect【C8】______in bars and clubs by monitoring noise levels. Last year, Minneapolis City Council made it【C9】______for bars and clubs to offer free ear buds to patrons. Stankovic thinks more will need to be done to change【C10】______accepted norms around recreational noise. " I think it will require a public health effort similar to the efforts for limiting smoking, because of the peer pressure associated with loud music and noisy environments," she says.
A)compulsory I)socially
B)condense J)standard
C)exposure K)techniques
D)incredibly L)transmit
E)independently M)treat
F)protection N)uneasy
G)restore O)workers
H)safeguard [br] 【C7】

选项

答案 H

解析该空格位于不定式短语中，前有副词properly，后有名词短语our ears，据此推断应填入动词原形。根据句意，大的噪音在很多公共场所应该像禁烟那样被禁止，这样才能——我们的耳朵，故答案为H)safeguard“保护，防卫”。备选项中，B)condense“凝结，浓缩”和M)treat“对待，治疗”均与上下文语义不符，故排除。

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